var msg=["username","age","sex"];
var stdin=process.stdin;
var index=0;
var infor=[];
console.log(msg[0]+":");

stdin.on('data',function(chunk){
    var str=chunk.toString('utf-8');
    infor[index]=str;
    index++;
    if(index==3){
        console.log(infor);
        process.exit();
    }
    console.log(msg[index]+":");
})